Stapeliæ novæ or, a collection of several new species of that genus; discovered in the interior parts of Africa. By Francis Masson - Masson, Francis 1741-1805 (printed by W. Bulmer and Co. for George Nicol, Bookseller to his Majesty, Pall-Mall, 1797)
English Short Title Catalog, T100541
Henrey, 1050
Plates 11-41 dated 1797
Reproduction of original from British Library
The preface is in English